Make sure to close your PersistenceManager instance in getCategories().
Are you seeing the original error or a different stack trace?
- Jason
On Sun, Sep 6, 2009 at 7:06 AM, Bob L. <bob.net2...@gmail.com> wrote:
>
> Oh mine! It occurred again. JDO looks quite fragile.
> Is there any wrong with following code?
>
> @PersistenceCapable(identityType = IdentityType.APPLICATION)
> public class Category {
> @PrimaryKey
> @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> private Long id;
> @Persistent
> private String name;
>
> public Category() {
> }
>
> public Category(String name) {
> this.name = name;
> }
>
> public Long getId() {
> return id;
> }
>
> public String getName() {
> return name;
> }
>
> public void setName(String name) {
> this.name = name;
> }
> }
>
> serverlet:
> ...
> @SuppressWarnings("unchecked")
> public List<Category> getCategories() {
> String query = "select from " + Category.class.getName();
> PersistenceManager pm = PMF.get().getPersistenceManager();
> try {
> return (List<Category>)
> pm.newQuery(query).execute();
> } catch (Exception ex) {
> }
>
> return null;
> }
>
> private void initializeCategories() {
> List<Category> categories = this.getCategories();
> if (categories == null || categories.isEmpty()) {
> categories = new ArrayList<Category>();
> Category category = new Category("Boys");
> categories.add(category);
> category = new Category("Girls");
> categories.add(category);
> PersistenceManager pm =
> PMF.get().getPersistenceManager();
> try {
> pm.makePersistentAll(categories);
> } finally {
> pm.close();
> }
> }
> }
> ...
> >
>
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